1. School of Mechanical and Automotive Engineering South China University of Technology 381#Wushan Road Guangzhou 510641 China
2. Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 China
3. School of Mechanical Engineering Tianjin Polytechnic University Tianjin 300387 China